Roadside - Benefit – Cost assessment See credit below: Thomas Bane Thomas R. Bane P. E. 605 Suwannee Street Mail-station 32 Tallahassee Florida 32399 (850) 414 -4379 thomas. bane@dot. state. fl. us
Benefit / Cost Ratio R(b/c) = Reduction in Accident Costs Increase in Construction & Maintenance Costs
Technical Advisory Roadside Design Guide RS 5. 0 NCHRP RSAP Non-Restricted Roadways
Technical Advisory Societal Costs/Severity Level ROADSIDE 5. 0
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Technical Advisory GLOBAL PARAMETER VALUES 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. FATAL ACCIDENT COST = $ 1, 000 SEVERE INJURY ACCIDENT COST = $ 200, 000 MODERATE INJURY ACCIDENT COST = $ 12, 500 SLIGHT INJURY ACCIDENT COST = $ 3, 750 PDO LEVEL 2 ACCIDENT COST = $ 3, 125 PDO LEVEL 1 ACCIDENT COST = $ 625 ENCROACHMENT RATE = 0. 0003000 ENCROACHMENTS/km/YR/VPD 50 km/h DES SPEED ENC ANGLE = 13. 0 DEG AND TRAF VOL CAP 60 km/h DES SPEED ENC ANGLE = 12. 8 DEG AND TRAF VOL CAP 70 km/h DES SPEED ENC ANGLE = 12. 4 DEG AND TRAF VOL CAP 80 km/h DES SPEED ENC ANGLE = 12. 0 DEG AND TRAF VOL CAP 90 km/h DES SPEED ENC ANGLE = 11. 6 DEG AND TRAF VOL CAP 100 km/h DES SPEED ENC ANGLE = 11. 1 DEG AND TRAF VOL CAP 110 km/h DES SPEED ENC ANGLE = 10. 7 DEG AND TRAF VOL CAP 120 km/h DES SPEED ENC ANGLE = 10. 3 DEG AND TRAF VOL CAP SWATH WIDTH = 3. 600 m RESET ALL GLOBALS TO DEFAULT STARTUP VALUES. DO YOU WISH TO CHANGE A PARAMETER VALUE (Y/N)? Y = = = = 24000 23900 23700 23300 22800 22000 21000 20000 VPD/LANE VPD/LANE
GLOBAL PARAMETER VALUES 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. FATAL ACCIDENT COST = $ 2, 600, 000 SEVERE INJURY ACCIDENT COST = $ 505, 000 MODERATE INJURY ACCIDENT COST = $ 165, 000 SLIGHT INJURY ACCIDENT COST = $ 36, 167 PDO LEVEL 2 ACCIDENT COST = $ 10, 469 PDO LEVEL 1 ACCIDENT COST = $ 2, 000 ENCROACHMENT RATE = 0. 0003000 ENCROACHMENTS/km/YR/VPD 50 km/h DES SPEED ENC ANGLE = 13. 0 DEG AND TRAF VOL CAP 60 km/h DES SPEED ENC ANGLE = 12. 8 DEG AND TRAF VOL CAP 70 km/h DES SPEED ENC ANGLE = 12. 4 DEG AND TRAF VOL CAP 80 km/h DES SPEED ENC ANGLE = 12. 0 DEG AND TRAF VOL CAP 90 km/h DES SPEED ENC ANGLE = 11. 6 DEG AND TRAF VOL CAP 100 km/h DES SPEED ENC ANGLE = 11. 1 DEG AND TRAF VOL CAP 110 km/h DES SPEED ENC ANGLE = 10. 7 DEG AND TRAF VOL CAP 120 km/h DES SPEED ENC ANGLE = 10. 3 DEG AND TRAF VOL CAP SWATH WIDTH = 3. 600 m RESET ALL GLOBALS TO DEFAULT STARTUP VALUES. DO YOU WISH TO CHANGE A PARAMETER VALUE (Y/N)? N = = = = 24000 23900 23700 23300 22800 22000 21000 20000 VPD/LANE VPD/LANE
CURRENT SEVERITY INDEX versus COST RELATIONSHIP SEVERITY INDEX 0. 0 0. 5 1. 0 2. 0 3. 0 4. 0 5. 0 6. 0 7. 0 8. 0 9. 0 10. 0 COST $ $ $ PRESS ENTER TO CONTINUE 0 2, 000 10, 250 26, 940 82, 498 170, 041 342, 277 639, 870 981, 526 1, 469, 147 2, 052, 450 2, 600, 000
Societal Costs $981, 562. 00 SI=7. 0
% Accidents Property Damage Only Non-Fatal Injuries Fatalities
1. 2. 3. 4. 5. TITLE: TRAFFIC VOLUME = 38, 900 VPD - TRAFFIC GROWTH RATE = 0. 650 % PER YEAR DIVIDED HIGHWAY TOTAL LANE(S) = 6 LANE WIDTH = 3. 300 m CURVATURE (RADIUS IN METERS) = %999, 999 GRADE (PERCENT) = 0. 0 EFFECTIVE BASELINE CURVATURE GRADE USER TOTAL TRAFFIC VPD ENC/km/YR FACTOR ENC/km/YR ADJACENT 19, 450 5. 8350 1. 00 5. 8350 OPPOSING 19, 450 0. 0000 1. 00 0. 0000 6. DESIGN SPEED = 70 km/h ENC ANGLE = 12. 4 DEG ADT CAP = 23, 700 VPD/LANE 7. OFFSET (A) = 3. 020 m LENGTH (L) = 0. 500 m WIDTH (W) = 0. 500 m 8. INITIAL COLLISION FREQUENCY = 0. 02615 IMPACTS/YEAR ADJACENT CFTA = 0. 0261 CFSU = 0. 0018 CFCU = 0. 0233 CFFA = 0. 0011 OPPOSING CFTO = 0. 0000 CFSD = 0. 0000 CFCD = 0. 0000 CFFO = 0. 0000 9. SEVERITY INDEX = SU= 4. 40 SD= 2. 00 CU= 4. 40 CD= 1. 00 FACE= 2. 20 ACCIDENT COST $ 238, 935 $ 26, 940 $ 238, 935 $ 10, 250 $ 38, 051 0. PROJECT LIFE = 13 YR DISCOUNT RATE = 7. 000 %/YR TRAFFIC CUTOFF YR = 200 CRF = 0. 11965 KC = 8. 66693 KT = 8. 35765 KJ = 0. 41496 1. INSTALLATION COST = $ 35, 000 SALVAGE VALUE = $ 0 2. REPAIR COST/ACC $ SU= 2000 SD= 1000 CU= 2000 CD= 1000 F= 1000 3. MAINTENANCE COST/YR = $ 100 4. PRESENT WORTH = $ 88, 590 ANNUALIZED $ 10, 600 ACCIDENT COST = $ 52, 310 ANNUALIZED $ 6, 259 HIGHWAY DEPT. COST = $ 36, 280 ANNUALIZED $ 4, 341 O CHANGE OR ACCESS: INPUT ITEM NUM. OR FUNCTION KEY (SEE BELOW) PLUS ENTER. PRINT STORE RECALL HELP GLOBAL SI v $ DIR SI DEF GRAPH QUIT
Actual Horizontal Offset
Effective Offset Actual Horizontal Offset Efficiency Factors: Slope => Es = 1+ slope/0. 4 Vaulting => Frnd = 1+ D slope Dslope-brake = -17. 34 m (Dslope)
1. 2. 3. 4. 5. TITLE: TRAFFIC VOLUME = 38, 900 VPD - TRAFFIC GROWTH RATE = 0. 650 % PER YEAR DIVIDED HIGHWAY TOTAL LANE(S) = 6 LANE WIDTH = 3. 300 m CURVATURE (RADIUS IN METERS) = %999, 999 GRADE (PERCENT) = 0. 0 EFFECTIVE BASELINE CURVATURE GRADE USER TOTAL TRAFFIC VPD ENC/km/YR FACTOR ENC/km/YR ADJACENT 19, 450 5. 8350 1. 00 5. 8350 OPPOSING 19, 450 0. 0000 1. 00 0. 0000 6. DESIGN SPEED = 70 km/h ENC ANGLE = 12. 4 DEG ADT CAP = 23, 700 VPD/LANE 7. OFFSET (A) = 3. 020 m LENGTH (L) = 0. 500 m WIDTH (W) = 0. 500 m 8. INITIAL COLLISION FREQUENCY = 0. 02615 IMPACTS/YEAR ADJACENT CFTA = 0. 0261 CFSU = 0. 0018 CFCU = 0. 0233 CFFA = 0. 0011 OPPOSING CFTO = 0. 0000 CFSD = 0. 0000 CFCD = 0. 0000 CFFO = 0. 0000 9. SEVERITY INDEX = SU= 4. 40 SD= 2. 00 CU= 4. 40 CD= 1. 00 FACE= 2. 20 ACCIDENT COST $ 238, 935 $ 26, 940 $ 238, 935 $ 10, 250 $ 38, 051 0. PROJECT LIFE = 13 YR DISCOUNT RATE = 7. 000 %/YR TRAFFIC CUTOFF YR = 200 CRF = 0. 11965 KC = 8. 66693 KT = 8. 35765 KJ = 0. 41496 1. INSTALLATION COST = $ 35, 000 SALVAGE VALUE = $ 0 2. REPAIR COST/ACC $ SU= 2000 SD= 1000 CU= 2000 CD= 1000 F= 1000 3. MAINTENANCE COST/YR = $ 100 4. PRESENT WORTH = $ 88, 590 ANNUALIZED $ 10, 600 ACCIDENT COST = $ 52, 310 ANNUALIZED $ 6, 259 HIGHWAY DEPT. COST = $ 36, 280 ANNUALIZED $ 4, 341 O CHANGE OR ACCESS: INPUT ITEM NUM. OR FUNCTION KEY (SEE BELOW) PLUS ENTER. PRINT STORE RECALL HELP GLOBAL SI v $ DIR SI DEF GRAPH QUIT
1. 2. 3. 4. 5. TITLE: TRAFFIC VOLUME = 38, 900 VPD - TRAFFIC GROWTH RATE = 0. 650 % PER YEAR DIVIDED HIGHWAY TOTAL LANE(S) = 6 LANE WIDTH = 3. 300 m CURVATURE (RADIUS IN METERS) = %999, 999 GRADE (PERCENT) = 0. 0 EFFECTIVE BASELINE CURVATURE GRADE USER TOTAL TRAFFIC VPD ENC/km/YR FACTOR ENC/km/YR ADJACENT 19, 450 5. 8350 1. 00 5. 8350 OPPOSING 19, 450 0. 0000 1. 00 0. 0000 6. DESIGN SPEED = 70 km/h ENC ANGLE = 12. 4 DEG ADT CAP = 23, 700 VPD/LANE 7. OFFSET (A) = 3. 020 m LENGTH (L) = 0. 500 m WIDTH (W) = 0. 500 m 8. INITIAL COLLISION FREQUENCY = 0. 02615 IMPACTS/YEAR ADJACENT CFTA = 0. 0261 CFSU = 0. 0018 CFCU = 0. 0233 CFFA = 0. 0011 OPPOSING CFTO = 0. 0000 CFSD = 0. 0000 CFCD = 0. 0000 CFFO = 0. 0000 9. SEVERITY INDEX = SU= 4. 40 SD= 2. 00 CU= 4. 40 CD= 1. 00 FACE= 2. 20 ACCIDENT COST $ 238, 935 $ 26, 940 $ 238, 935 $ 10, 250 $ 38, 051 0. PROJECT LIFE = 13 YR DISCOUNT RATE = 7. 000 %/YR TRAFFIC CUTOFF YR = 200 CRF = 0. 11965 KC = 8. 66693 KT = 8. 35765 KJ = 0. 41496 1. INSTALLATION COST = $ 35, 000 SALVAGE VALUE = $ 0 2. REPAIR COST/ACC $ SU= 2000 SD= 1000 CU= 2000 CD= 1000 F= 1000 3. MAINTENANCE COST/YR = $ 100 4. PRESENT WORTH = $ 88, 590 ANNUALIZED $ 10, 600 ACCIDENT COST = $ 52, 310 ANNUALIZED $ 6, 259 HIGHWAY DEPT. COST = $ 36, 280 ANNUALIZED $ 4, 341 O CHANGE OR ACCESS: INPUT ITEM NUM. OR FUNCTION KEY (SEE BELOW) PLUS ENTER. PRINT STORE RECALL HELP GLOBAL SI v $ DIR SI DEF GRAPH QUIT
1. 2. 3. 4. 5. TITLE: TRAFFIC VOLUME = 38, 900 VPD - TRAFFIC GROWTH RATE = 0. 650 % PER YEAR DIVIDED HIGHWAY TOTAL LANE(S) = 6 LANE WIDTH = 3. 300 m CURVATURE (RADIUS IN METERS) = %999, 999 GRADE (PERCENT) = 0. 0 EFFECTIVE BASELINE CURVATURE GRADE USER TOTAL TRAFFIC VPD ENC/km/YR FACTOR ENC/km/YR ADJACENT 19, 450 5. 8350 1. 00 5. 8350 OPPOSING 19, 450 0. 0000 1. 00 0. 0000 6. DESIGN SPEED = 70 km/h ENC ANGLE = 12. 4 DEG ADT CAP = 23, 700 VPD/LANE 7. OFFSET (A) = 3. 020 m LENGTH (L) = 0. 500 m WIDTH (W) = 0. 500 m 8. INITIAL COLLISION FREQUENCY = 0. 02615 IMPACTS/YEAR ADJACENT CFTA = 0. 0261 CFSU = 0. 0018 CFCU = 0. 0233 CFFA = 0. 0011 OPPOSING CFTO = 0. 0000 CFSD = 0. 0000 CFCD = 0. 0000 CFFO = 0. 0000 9. SEVERITY INDEX = SU= 4. 40 SD= 2. 00 CU= 4. 40 CD= 1. 00 FACE= 2. 20 ACCIDENT COST $ 238, 935 $ 26, 940 $ 238, 935 $ 10, 250 $ 38, 051 0. PROJECT LIFE = 13 YR DISCOUNT RATE = 7. 000 %/YR TRAFFIC CUTOFF YR = 200 CRF = 0. 11965 KC = 8. 66693 KT = 8. 35765 KJ = 0. 41496 1. INSTALLATION COST = $ 35, 000 SALVAGE VALUE = $ 0 2. REPAIR COST/ACC $ SU= 2000 SD= 1000 CU= 2000 CD= 1000 F= 1000 3. MAINTENANCE COST/YR = $ 100 4. PRESENT WORTH = $ 88, 590 ANNUALIZED $ 10, 600 ACCIDENT COST = $ 52, 310 ANNUALIZED $ 6, 259 HIGHWAY DEPT. COST = $ 36, 280 ANNUALIZED $ 4, 341 O CHANGE OR ACCESS: INPUT ITEM NUM. OR FUNCTION KEY (SEE BELOW) PLUS ENTER. PRINT STORE RECALL HELP GLOBAL SI v $ DIR SI DEF GRAPH QUIT
Reduction in Accident Costs Condition 1 Condition 2 ROADSIDE 5. 0 Acc. Costs 1 Acc. Costs 2 Reduction in Accident Costs
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